use go-cmp for more tests

measure_test.go

@@ -1,12 +1,15 @@
 package main
 
 import (
-	"reflect"
 	"strings"
 	"testing"
 	"time"
+
+	"github.com/google/go-cmp/cmp"
 )
 
+var measureCmpOpts = cmp.AllowUnexported(collectedMeasurements{}, measurementSummary{}, entrySummary{})
+
 func TestCollectMeasurementsOK(t *testing.T) {
 	for _, path := range []string{"vim", "nvim"} {
 		t.Run(path, func(t *testing.T) {
@@ -108,8 +111,8 @@ func TestSummarizeStartuptime(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if !reflect.DeepEqual(want, have) {
-		t.Fatal("Unexpected average value", have, ", wanted", want)
+	if !cmp.Equal(want, have, measureCmpOpts) {
+		t.Fatal(cmp.Diff(want, have, measureCmpOpts))
 	}
 }
 

measurement_test.go

@@ -5,6 +5,8 @@ import (
 	"strings"
 	"testing"
 	"time"
+
+	"github.com/google/go-cmp/cmp"
 )
 
 func TestPrintSummary(t *testing.T) {
@@ -94,14 +96,8 @@ func TestPrintSummary(t *testing.T) {
 			}
 			lines = lines[:len(lines)-1]
 
-			if len(lines) != len(tc.want) {
-				t.Fatalf("Number of lines does not match: %d v.s. %d. ('%s' v.s. '%s')", len(tc.want), len(lines), tc.want, lines)
-			}
-			for i := range lines {
-				want, have := tc.want[i], lines[i]
-				if have != want {
-					t.Errorf("Line %d does not match: Wanted '%s' but have '%s'", i+1, want, have)
-				}
+			if !cmp.Equal(lines, tc.want) {
+				t.Fatal(cmp.Diff(lines, tc.want))
 			}
 		})
 	}

parse_test.go

@@ -3,12 +3,15 @@ package main
 import (
 	"fmt"
 	"os"
-	"reflect"
 	"strings"
 	"testing"
 	"time"
+
+	"github.com/google/go-cmp/cmp"
 )
 
+var parseCmpOpts = cmp.AllowUnexported(measurement{}, measurementEntry{})
+
 func TestParseOK(t *testing.T) {
 	tmpfile, err := os.CreateTemp("", "__test_parse_ok")
 	if err != nil {
@@ -179,20 +182,8 @@ times in msec
 				t.Fatal(err)
 			}
 
-			w := tc.expected
-			if m.elapsedTotal != w.elapsedTotal {
-				t.Error("Want total", w.elapsedTotal, "but have", m.elapsedTotal)
-			}
-
-			if len(w.entries) != len(m.entries) {
-				t.Fatal("Want #entries", w.entries, "but have", m.entries)
-			}
-			for i := range w.entries {
-				have := m.entries[i]
-				want := w.entries[i]
-				if !reflect.DeepEqual(have, want) {
-					t.Errorf("%dth entry not match. Want '%+v', but have '%+v'", i, want, have)
-				}
+			if !cmp.Equal(m, tc.expected, parseCmpOpts) {
+				t.Fatal(cmp.Diff(m, tc.expected, parseCmpOpts))
 			}
 		})
 	}

vim_test.go

@@ -39,7 +39,7 @@ func TestRunVimOK(t *testing.T) {
 	}
 }
 
-func TestStartError(t *testing.T) {
+func TestRunVimError(t *testing.T) {
 	for _, exe := range []string{"vim", "nvim"} {
 		t.Run(exe, func(t *testing.T) {
 			dir, err := os.MkdirTemp("", "__vim_run_test_error_")