chore: remove stale code review artifact

- Add tests for types package: NewDataSet, NewCommit, Commit.String,
  Freq.Merge, DataSet operations
- Add tests for graph/common package: MinMax, ColorForFrequency,
  CreateGraph, SetColorScheme
- Fix goimports alignment in common.go and settings.go

graph/common/common.go

@@ -8,7 +8,7 @@ import (
 )
 
 var (
-	colorScheme  []sc.SimpleColor
+	colorScheme []sc.SimpleColor
 )
 
 func CreateGraph() bytes.Buffer {

graph/common/common_test.go

@@ -0,0 +1,125 @@
+package common
+
+import (
+	"testing"
+
+	sc "github.com/taigrr/simplecolorpalettes/simplecolor"
+)
+
+func TestMinMax(t *testing.T) {
+	tests := []struct {
+		name       string
+		input      []int
+		wantMin    int
+		wantMax    int
+	}{
+		{
+			name:    "normal values",
+			input:   []int{3, 1, 4, 1, 5, 9, 2, 6},
+			wantMin: 1,
+			wantMax: 9,
+		},
+		{
+			name:    "with zeros",
+			input:   []int{0, 3, 0, 7, 0, 2},
+			wantMin: 2,
+			wantMax: 7,
+		},
+		{
+			name:    "all zeros",
+			input:   []int{0, 0, 0},
+			wantMin: 0,
+			wantMax: 0,
+		},
+		{
+			name:    "single element",
+			input:   []int{5},
+			wantMin: 5,
+			wantMax: 5,
+		},
+		{
+			name:    "single zero",
+			input:   []int{0},
+			wantMin: 0,
+			wantMax: 0,
+		},
+		{
+			name:    "all same non-zero",
+			input:   []int{4, 4, 4},
+			wantMin: 4,
+			wantMax: 4,
+		},
+		{
+			name:    "empty slice",
+			input:   []int{},
+			wantMin: 0,
+			wantMax: 0,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			min, max := MinMax(tt.input)
+			if min != tt.wantMin {
+				t.Errorf("min: expected %d, got %d", tt.wantMin, min)
+			}
+			if max != tt.wantMax {
+				t.Errorf("max: expected %d, got %d", tt.wantMax, max)
+			}
+		})
+	}
+}
+
+func TestColorForFrequency(t *testing.T) {
+	// freq=0 should always return SimpleColor(0)
+	c := ColorForFrequency(0, 1, 10)
+	if c != sc.SimpleColor(0) {
+		t.Errorf("expected SimpleColor(0) for freq=0, got %v", c)
+	}
+
+	// Non-zero freq with small spread should return a valid color
+	c = ColorForFrequency(1, 1, 3)
+	if c == sc.SimpleColor(0) {
+		t.Error("expected non-zero color for freq=1 with small spread")
+	}
+
+	// Non-zero freq with large spread
+	c = ColorForFrequency(50, 1, 100)
+	if c == sc.SimpleColor(0) {
+		t.Error("expected non-zero color for freq=50 in range 1-100")
+	}
+
+	// Max frequency should return the last color
+	c = ColorForFrequency(100, 1, 100)
+	if c == sc.SimpleColor(0) {
+		t.Error("expected non-zero color for max frequency")
+	}
+
+	// Min frequency should return first real color
+	c = ColorForFrequency(1, 1, 100)
+	if c == sc.SimpleColor(0) {
+		t.Error("expected non-zero color for min frequency")
+	}
+}
+
+func TestCreateGraph(t *testing.T) {
+	buf := CreateGraph()
+	if buf.Len() != 0 {
+		t.Errorf("expected empty buffer, got %d bytes", buf.Len())
+	}
+}
+
+func TestSetColorScheme(t *testing.T) {
+	// Save original length
+	origLen := len(colorScheme)
+
+	// Reset after test
+	defer func() {
+		colorScheme = colorScheme[:origLen]
+	}()
+
+	// SetColorScheme should append colors
+	SetColorScheme(nil)
+	if len(colorScheme) != origLen {
+		t.Errorf("expected length %d after nil input, got %d", origLen, len(colorScheme))
+	}
+}

types/types_test.go

@@ -0,0 +1,137 @@
+package types
+
+import (
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestNewDataSet(t *testing.T) {
+	ds := NewDataSet()
+	if ds == nil {
+		t.Fatal("NewDataSet returned nil")
+	}
+	if len(ds) != 0 {
+		t.Fatalf("expected empty DataSet, got %d entries", len(ds))
+	}
+}
+
+func TestNewCommit(t *testing.T) {
+	c := NewCommit("Alice", "alice@example.com", "initial commit", "myrepo", "/tmp/myrepo", 10, 2, 3)
+	if c.Author.Name != "Alice" {
+		t.Errorf("expected author name Alice, got %s", c.Author.Name)
+	}
+	if c.Author.Email != "alice@example.com" {
+		t.Errorf("expected author email alice@example.com, got %s", c.Author.Email)
+	}
+	if c.Message != "initial commit" {
+		t.Errorf("expected message 'initial commit', got %s", c.Message)
+	}
+	if c.Added != 10 {
+		t.Errorf("expected Added=10, got %d", c.Added)
+	}
+	if c.Deleted != 2 {
+		t.Errorf("expected Deleted=2, got %d", c.Deleted)
+	}
+	if c.FilesChanged != 3 {
+		t.Errorf("expected FilesChanged=3, got %d", c.FilesChanged)
+	}
+	if c.Repo != "myrepo" {
+		t.Errorf("expected Repo=myrepo, got %s", c.Repo)
+	}
+	if c.Path != "/tmp/myrepo" {
+		t.Errorf("expected Path=/tmp/myrepo, got %s", c.Path)
+	}
+	if c.TimeStamp.IsZero() {
+		t.Error("expected non-zero timestamp")
+	}
+}
+
+func TestCommitString(t *testing.T) {
+	ts := time.Date(2025, 6, 15, 14, 30, 0, 0, time.UTC)
+	c := Commit{
+		TimeStamp: ts,
+		Author:    Author{Name: "Bob", Email: "bob@example.com"},
+		Repo:      "testrepo",
+		Message:   "fix bug",
+	}
+	s := c.String()
+	if !strings.Contains(s, "testrepo") {
+		t.Errorf("expected string to contain repo name, got: %s", s)
+	}
+	if !strings.Contains(s, "fix bug") {
+		t.Errorf("expected string to contain message, got: %s", s)
+	}
+}
+
+func TestFreqMerge(t *testing.T) {
+	tests := []struct {
+		name string
+		a, b Freq
+		want Freq
+	}{
+		{
+			name: "equal length",
+			a:    Freq{1, 2, 3},
+			b:    Freq{4, 5, 6},
+			want: Freq{5, 7, 9},
+		},
+		{
+			name: "a shorter than b",
+			a:    Freq{1, 2},
+			b:    Freq{3, 4, 5},
+			want: Freq{4, 6, 5},
+		},
+		{
+			name: "b shorter than a",
+			a:    Freq{1, 2, 3},
+			b:    Freq{4, 5},
+			want: Freq{5, 7, 3},
+		},
+		{
+			name: "empty a",
+			a:    Freq{},
+			b:    Freq{1, 2, 3},
+			want: Freq{1, 2, 3},
+		},
+		{
+			name: "empty b",
+			a:    Freq{1, 2, 3},
+			b:    Freq{},
+			want: Freq{1, 2, 3},
+		},
+		{
+			name: "both empty",
+			a:    Freq{},
+			b:    Freq{},
+			want: Freq{},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := tt.a.Merge(tt.b)
+			if len(got) != len(tt.want) {
+				t.Fatalf("expected length %d, got %d", len(tt.want), len(got))
+			}
+			for i := range tt.want {
+				if got[i] != tt.want[i] {
+					t.Errorf("index %d: expected %d, got %d", i, tt.want[i], got[i])
+				}
+			}
+		})
+	}
+}
+
+func TestDataSetOperations(t *testing.T) {
+	ds := NewDataSet()
+	now := time.Now().Truncate(24 * time.Hour)
+	ds[now] = WorkDay{
+		Day:   now,
+		Count: 5,
+	}
+	if wd, ok := ds[now]; !ok {
+		t.Fatal("expected to find workday for today")
+	} else if wd.Count != 5 {
+		t.Errorf("expected count 5, got %d", wd.Count)
+	}
+}

ui/settings.go

@@ -17,13 +17,13 @@ const (
 type (
 	SettingsCursor int
 	Settings       struct {
-		AllAuthors       selectablelist
-		SelectedAuthors  []string
-		AllRepos         selectablelist
-		SelectedRepos    []string
-		cursor           SettingsCursor
-		AuthorList       list.Model
-		RepoList         list.Model
+		AllAuthors      selectablelist
+		SelectedAuthors []string
+		AllRepos        selectablelist
+		SelectedRepos   []string
+		cursor          SettingsCursor
+		AuthorList      list.Model
+		RepoList        list.Model
 	}
 )