Function TestStringArrayFlagSetEmptyValues

betteralign_unit_test.go:921–955

─── Layer 11: StringArrayFlag.Set (BUG-26) ────────────────────────────────── TestStringArrayFlagSetEmptyValues verifies that StringArrayFlag.Set never appends empty strings. BUG-26: strings.Split(value, ",") yields a single empty entry for "" and adjacent empty entries for "a,", ",a", and "a,,b". A

(t *testing.T)

// excludeDirs makes filepath.Rel(".", dir) succeed for every file, silently
// excluding the entire tree from analysis.
func TestStringArrayFlagSetEmptyValues(t *testing.T) {
	tests := []struct {
		name  string
		input string
		want  []string
	}{
		{"empty string yields no entries", "", nil},
		{"single non-empty value", "a", []string{"a"}},
		{"trailing comma drops empty tail", "a,", []string{"a"}},
		{"leading comma drops empty head", ",a", []string{"a"}},
		{"adjacent commas drop empty middle", "a,,b", []string{"a", "b"}},
		{"only commas yields no entries", ",,", nil},
		{"surrounding whitespace trimmed", " a , b ", []string{"a", "b"}},
		{"tab whitespace trimmed", "\ta\t,\tb\t", []string{"a", "b"}},
		{"whitespace-only entries dropped", " , a , ", []string{"a"}},
		{"internal whitespace preserved", "my path,other path", []string{"my path", "other path"}},
	}
	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			var f StringArrayFlag
			if err := f.Set(tc.input); err != nil {
				t.Fatalf("Set(%q) returned error: %v", tc.input, err)
			}
			if len(f) != len(tc.want) {
				t.Fatalf("Set(%q): got %d entries %v, want %d entries %v",
					tc.input, len(f), []string(f), len(tc.want), tc.want)
			}
			for i := range f {
				if f[i] != tc.want[i] {
					t.Errorf("Set(%q)[%d] = %q, want %q", tc.input, i, f[i], tc.want[i])
				}
			}
		})
	}
}

// ─── Layer 12: commentGroupHasOptIn / isExcluded / commentHasDirective ───────