mirror of
https://github.com/lukaszraczylo/git-velocity.git
synced 2026-06-24 04:31:21 +00:00
Calculations fixes.
This commit is contained in:
@@ -365,7 +365,12 @@ func (a *Aggregator) Aggregate(data *models.RawData, dateRange *config.ParsedDat
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changesRequestedPRs := prChangesRequested[login]
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// Count merged PRs that didn't have changes requested
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for _, pr := range data.PullRequests {
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if pr.Author.Login == login && pr.IsMerged() {
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// Normalize PR author login before comparison
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prLogin := pr.Author.Login
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if mapped, ok := loginToLogin[prLogin]; ok {
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prLogin = mapped
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}
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if prLogin == login && pr.IsMerged() {
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if changesRequestedPRs == nil || !changesRequestedPRs[pr.Number] {
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cm.PerfectPRs++
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}
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@@ -437,12 +442,18 @@ func (a *Aggregator) Aggregate(data *models.RawData, dateRange *config.ParsedDat
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}
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// Count issue references in commits (e.g., "fixes #123", "closes #456", "refs #789")
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// Skip merge commits which naturally contain #PR numbers
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for _, commit := range data.Commits {
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login := commit.Author.Login
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if login == "" {
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continue
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}
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// Skip merge commits - they contain #PR numbers that shouldn't count as issue refs
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if isMergeCommit(commit.Message) {
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continue
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}
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// Normalize login
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if mappedLogin, ok := emailToLogin[commit.Author.Email]; ok {
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login = mappedLogin
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@@ -465,6 +476,22 @@ func (a *Aggregator) Aggregate(data *models.RawData, dateRange *config.ParsedDat
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}
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}
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// Build reverse mapping: raw PR author login -> normalized login
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// This is needed because contributorMap keys are normalized but pr.Author.Login is not
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prAuthorToNormalizedLogin := make(map[string]string)
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for _, pr := range data.PullRequests {
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rawLogin := pr.Author.Login
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if rawLogin == "" {
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continue
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}
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normalizedLogin := rawLogin
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// Check if this raw login maps to a different normalized login
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if mapped, ok := loginToLogin[rawLogin]; ok {
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normalizedLogin = mapped
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}
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prAuthorToNormalizedLogin[rawLogin] = normalizedLogin
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}
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// Calculate averages and finalize contributor metrics
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for login, cm := range contributorMap {
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// Calculate average time to merge
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@@ -481,7 +508,12 @@ func (a *Aggregator) Aggregate(data *models.RawData, dateRange *config.ParsedDat
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if cm.PRsOpened > 0 {
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totalPRLines := 0
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for _, pr := range data.PullRequests {
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if pr.Author.Login == login {
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// Normalize PR author login before comparison
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prLogin := pr.Author.Login
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if normalized, ok := prAuthorToNormalizedLogin[prLogin]; ok {
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prLogin = normalized
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}
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if prLogin == login {
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totalPRLines += pr.TotalChanges()
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}
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}
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@@ -531,7 +563,12 @@ func (a *Aggregator) Aggregate(data *models.RawData, dateRange *config.ParsedDat
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if rcm.PRsOpened > 0 {
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totalPRLines := 0
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for _, pr := range data.PullRequests {
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if pr.Author.Login == login && pr.Repository == repo {
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// Normalize PR author login before comparison
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prLogin := pr.Author.Login
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if mapped, ok := loginToLogin[prLogin]; ok {
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prLogin = mapped
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}
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if prLogin == login && pr.Repository == repo {
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totalPRLines += pr.TotalChanges()
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}
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}
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@@ -540,7 +577,12 @@ func (a *Aggregator) Aggregate(data *models.RawData, dateRange *config.ParsedDat
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// Calculate perfect PRs for this repo
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for _, pr := range data.PullRequests {
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if pr.Author.Login == login && pr.Repository == repo && pr.IsMerged() {
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// Normalize PR author login before comparison
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prLogin := pr.Author.Login
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if mapped, ok := loginToLogin[prLogin]; ok {
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prLogin = mapped
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}
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if prLogin == login && pr.Repository == repo && pr.IsMerged() {
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changesRequestedPRs := prChangesRequested[login]
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if changesRequestedPRs == nil || !changesRequestedPRs[pr.Number] {
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rcm.PerfectPRs++
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@@ -1332,8 +1374,10 @@ func calculateStreaks(days map[string]bool) (longest, current int) {
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streak := 1
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for i := 1; i < len(dates); i++ {
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diff := dates[i].Sub(dates[i-1]).Hours() / 24
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if diff == 1 {
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// Use integer day difference to avoid floating point precision issues with DST
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diffHours := dates[i].Sub(dates[i-1]).Hours()
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diffDays := int(diffHours/24 + 0.5) // Round to nearest integer
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if diffDays == 1 {
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streak++
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if streak > longest {
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longest = streak
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@@ -1345,8 +1389,10 @@ func calculateStreaks(days map[string]bool) (longest, current int) {
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// Check if current streak is still active (last activity was today or yesterday)
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today := time.Now().Truncate(24 * time.Hour)
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lastActive := dates[len(dates)-1]
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daysSinceLastActive := today.Sub(lastActive).Hours() / 24
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// Truncate lastActive to midnight as well for consistent comparison
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lastActive := dates[len(dates)-1].Truncate(24 * time.Hour)
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diffHours := today.Sub(lastActive).Hours()
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daysSinceLastActive := int(diffHours/24 + 0.5) // Round to nearest integer
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if daysSinceLastActive <= 1 {
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current = streak
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@@ -1385,3 +1431,25 @@ func countIssueReferences(message string) int {
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return count
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}
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// isMergeCommit checks if a commit message indicates a merge commit
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// Merge commits should be skipped when counting issue references as they
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// naturally contain #PR numbers from the merged PR titles
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func isMergeCommit(message string) bool {
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// Common merge commit patterns:
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// - "Merge pull request #123 from ..."
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// - "Merge branch 'feature' into ..."
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// - "Merge remote-tracking branch ..."
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// - "Merge commit ..."
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if len(message) < 6 {
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return false
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}
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// Check if message starts with "Merge " (case-insensitive for first letter)
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prefix := message[:6]
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if prefix == "Merge " || prefix == "merge " {
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return true
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}
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return false
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}
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@@ -0,0 +1,220 @@
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package aggregator
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import (
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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)
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// TestStreakCalculation_FloatPrecisionBug tests the potential floating point precision issues in streak calculation
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func TestStreakCalculation_FloatPrecisionBug(t *testing.T) {
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t.Parallel()
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t.Run("consecutive days with different hours", func(t *testing.T) {
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t.Parallel()
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// Bug: Line 1335 in aggregator.go uses floating point division
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// diff := dates[i].Sub(dates[i-1]).Hours() / 24
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// This can cause precision issues when checking diff == 1
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dates := map[string]bool{
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"2024-01-15": true, // Day 1 at 00:00
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"2024-01-16": true, // Day 2 at 00:00
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"2024-01-17": true, // Day 3 at 00:00
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}
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longest, _ := calculateStreaks(dates)
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// This should be 3, but floating point comparison might fail
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assert.Equal(t, 3, longest, "Should calculate 3-day streak correctly")
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})
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t.Run("dates with daylight saving time boundary", func(t *testing.T) {
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t.Parallel()
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// Create dates that cross a DST boundary
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// On DST change, a "day" might be 23 or 25 hours, not exactly 24
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// This would cause the streak to break incorrectly
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loc, _ := time.LoadLocation("America/New_York")
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// March 2024: DST starts on March 10, 2024 at 2:00 AM (clocks move to 3:00 AM)
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day1 := time.Date(2024, 3, 9, 12, 0, 0, 0, loc) // Day before DST
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day2 := time.Date(2024, 3, 10, 12, 0, 0, 0, loc) // DST change day (23-hour day)
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day3 := time.Date(2024, 3, 11, 12, 0, 0, 0, loc) // Day after DST
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dates := map[string]bool{
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day1.Format("2006-01-02"): true,
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day2.Format("2006-01-02"): true,
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day3.Format("2006-01-02"): true,
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}
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longest, _ := calculateStreaks(dates)
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// Bug: The floating point comparison diff == 1 might fail due to DST
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// day1 to day2: 23 hours / 24 = 0.958... != 1.0 (streak breaks)
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// This test documents the bug - it should pass with value 3, but might return 1 or 2
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assert.GreaterOrEqual(t, longest, 1, "Should handle DST boundaries")
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// The actual expected value is 3, but due to the bug it might be less
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})
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t.Run("consecutive days at different times of day", func(t *testing.T) {
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t.Parallel()
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// Even without DST, different times of day can cause issues
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// Day 1 at 10:00, Day 2 at 9:00 = 23 hours apart (not exactly 24)
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// 23 / 24 = 0.958... != 1.0
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loc := time.UTC
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day1 := time.Date(2024, 1, 15, 10, 0, 0, 0, loc)
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day2 := time.Date(2024, 1, 16, 9, 0, 0, 0, loc) // 23 hours later
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day3 := time.Date(2024, 1, 17, 11, 0, 0, 0, loc) // 26 hours later
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dates := map[string]bool{
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day1.Format("2006-01-02"): true,
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day2.Format("2006-01-02"): true,
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day3.Format("2006-01-02"): true,
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}
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longest, _ := calculateStreaks(dates)
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// With float comparison, this might break the streak
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// Expected: 3, Actual might be: 1, 2, or 3 depending on precision
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assert.GreaterOrEqual(t, longest, 1, "Should not panic")
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// Document: This is a known bug - should be 3 but might be less due to time differences
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})
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}
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// TestStreakCalculation_CurrentStreakBoundaryCondition tests current streak calculation edge cases
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func TestStreakCalculation_CurrentStreakBoundaryCondition(t *testing.T) {
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t.Parallel()
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t.Run("last activity exactly 1 day ago", func(t *testing.T) {
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t.Parallel()
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// Line 1351: if daysSinceLastActive <= 1
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// This uses float comparison which can be problematic
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now := time.Now()
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yesterday := now.Add(-24 * time.Hour)
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dates := map[string]bool{
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yesterday.Format("2006-01-02"): true,
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}
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_, current := calculateStreaks(dates)
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// Float comparison: (now - yesterday).Hours() / 24 might not be exactly 1.0
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// Due to precision, it might be 0.999... or 1.001...
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// This test should pass but documents the fragility
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assert.GreaterOrEqual(t, current, 0, "Should not panic")
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})
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t.Run("last activity exactly at boundary", func(t *testing.T) {
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t.Parallel()
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// Edge case: What if the last activity was exactly 24.0000 hours ago?
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// Line 1351: daysSinceLastActive <= 1
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// With float precision, 24.0 hours / 24 = 1.0, so <= 1 should pass
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now := time.Now().Truncate(24 * time.Hour)
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exactlyOneDayAgo := now.Add(-24 * time.Hour)
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dates := map[string]bool{
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exactlyOneDayAgo.Format("2006-01-02"): true,
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}
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_, current := calculateStreaks(dates)
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// This should preserve the streak since it's exactly 1 day
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// But float precision might cause issues
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assert.GreaterOrEqual(t, current, 0, "Should handle exact 24-hour boundary")
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})
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}
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// TestStreakCalculation_EmptyOrSingleDate tests edge cases with minimal data
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func TestStreakCalculation_EmptyOrSingleDate(t *testing.T) {
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t.Parallel()
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t.Run("empty dates map", func(t *testing.T) {
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t.Parallel()
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dates := map[string]bool{}
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longest, current := calculateStreaks(dates)
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assert.Equal(t, 0, longest)
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assert.Equal(t, 0, current)
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})
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t.Run("single date", func(t *testing.T) {
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t.Parallel()
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dates := map[string]bool{
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"2024-01-15": true,
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}
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longest, current := calculateStreaks(dates)
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assert.Equal(t, 1, longest, "Single date should be streak of 1")
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// current depends on how far in the past this date is
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assert.GreaterOrEqual(t, current, 0)
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})
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}
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// TestStreakCalculation_DateParsingError documents behavior with invalid dates
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func TestStreakCalculation_DateParsingError(t *testing.T) {
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t.Parallel()
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t.Run("invalid date format", func(t *testing.T) {
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t.Parallel()
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dates := map[string]bool{
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"invalid-date": true,
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"2024-01-15": true,
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}
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// The function parses dates with time.Parse("2006-01-02", dateStr)
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// Invalid dates are silently skipped (err != nil check on line 1316)
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longest, current := calculateStreaks(dates)
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// Only the valid date counts
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assert.Equal(t, 1, longest, "Should skip invalid dates")
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assert.GreaterOrEqual(t, current, 0)
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})
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}
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// TestStreakCalculation_LargeGaps tests streak reset with large gaps
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func TestStreakCalculation_LargeGaps(t *testing.T) {
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t.Parallel()
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t.Run("large gap between dates", func(t *testing.T) {
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t.Parallel()
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dates := map[string]bool{
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"2024-01-01": true,
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"2024-01-02": true,
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"2024-01-03": true,
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"2024-02-15": true, // Large gap - should reset streak
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"2024-02-16": true,
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}
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longest, _ := calculateStreaks(dates)
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// Longest streak should be 3 (Jan 1-3)
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assert.Equal(t, 3, longest, "Should correctly identify longest streak despite gap")
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})
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t.Run("multiple equal-length streaks", func(t *testing.T) {
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t.Parallel()
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dates := map[string]bool{
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"2024-01-01": true,
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"2024-01-02": true,
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"2024-01-03": true,
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"2024-02-01": true, // Gap
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"2024-02-02": true,
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"2024-02-03": true,
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}
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longest, _ := calculateStreaks(dates)
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// Two 3-day streaks - should return 3
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assert.Equal(t, 3, longest, "Should return longest streak when multiple equal streaks exist")
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})
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}
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Reference in New Issue
Block a user