WIP components (as built)

file_preview_test.go

@@ -0,0 +1,127 @@
+package mujica
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/egoist/mygo/ui"
+)
+
+type previewProbe struct {
+	f                       PreviewFile
+	opts                    FilePreviewOptions
+	closed, opened, retried int
+}
+
+func (p *previewProbe) view(c *ui.Context) {
+	Use(c, Settings{})
+	r := FilePreview(c, p.f, p.opts)
+	r.Element.Size(480, 300)
+	for _, e := range []struct {
+		on bool
+		n  *int
+	}{{r.Closed, &p.closed}, {r.Opened, &p.opened}, {r.Retried, &p.retried}} {
+		if e.on {
+			*e.n++
+		}
+	}
+}
+
+func TestFilePreviewKinds(t *testing.T) {
+	cases := []struct {
+		f    PreviewFile
+		want string
+	}{
+		{PreviewFile{Name: "seal.go", Text: "package court\nfunc Seal() {}"}, "func Seal() {}"},
+		{PreviewFile{Name: "notes.md", Text: "# The court"}, "# The court"},
+		{PreviewFile{Name: "deed.pdf", Size: 4096}, "No preview for PDF files"},
+		{PreviewFile{Name: "crest.svg", Image: ui.MustParseSVG([]byte(`<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 4 4"><rect width="4" height="4"/></svg>`))}, "crest.svg"},
+	}
+	for _, tc := range cases {
+		tt := ui.NewTester((&previewProbe{f: tc.f}).view, 500, 320)
+		if !tt.HasText(tc.want) {
+			t.Fatalf("%s: texts %q", tc.f.Name, tt.Texts())
+		}
+	}
+	tt := ui.NewTester((&previewProbe{f: PreviewFile{Name: "deed.pdf", Size: 4096}}).view, 500, 320)
+	if !tt.HasText("4 KB") {
+		t.Fatal("size missing")
+	}
+}
+
+func TestFilePreviewActions(t *testing.T) {
+	p := &previewProbe{f: PreviewFile{Name: "notes.md", Text: "text"}}
+	tt := ui.NewTester(p.view, 500, 320)
+	_ = tt.Click("Open")
+	_ = tt.Click("Close preview")
+	tt.Key(0, ui.KeyTab)
+	tt.Key(0, ui.KeyEscape)
+	if p.opened != 1 || p.closed != 2 {
+		t.Fatalf("opened %d closed %d", p.opened, p.closed)
+	}
+}
+
+func TestFilePreviewStatusAndNoName(t *testing.T) {
+	p := &previewProbe{f: PreviewFile{Name: "big.log"}, opts: FilePreviewOptions{Status: DataFailed, Error: "read denied"}}
+	tt := ui.NewTester(p.view, 500, 320)
+	if !tt.HasText("read denied") {
+		t.Fatalf("texts %q", tt.Texts())
+	}
+	_ = tt.Click("Retry")
+	if p.retried != 1 {
+		t.Fatal("retry not reported")
+	}
+	defer func() {
+		if recover() == nil {
+			t.Fatal("missing name did not panic")
+		}
+	}()
+	ui.NewTester((&previewProbe{}).view, 500, 320)
+}
+
+func TestFilePreviewSnapshot(t *testing.T) {
+	snapshot(t, "file_preview", 500, 340, func(c *ui.Context) {
+		ui.Column(c).Padding(12).Children(func() {
+			FilePreview(c, PreviewFile{Name: "seal.go", Size: 912, Text: "package court\n\n// Seal stamps a decree.\nfunc Seal(d string) int {\n\treturn len(d)\n}"}, FilePreviewOptions{}).Element.Height(316)
+		})
+	})
+}
+
+func TestFilePreviewEmptyCode(t *testing.T) {
+	for _, f := range []PreviewFile{{Name: "empty.go"}, {Name: "empty.html"}, {Name: "empty.custom", Language: "go"}} {
+		tt := ui.NewTester((&previewProbe{f: f}).view, 500, 320)
+		if tt.HasText("No preview for GO files") || tt.HasText("No preview for HTML files") || tt.HasText("No preview for CUSTOM files") {
+			t.Fatalf("empty code shows unsupported type: %s", f.Name)
+		}
+	}
+}
+
+func TestFilePreviewLargeCodeCache(t *testing.T) {
+	file := PreviewFile{Name: "large.go", Text: strings.Repeat("var seal = 1\n", 100000)}
+	var state *previewCodeState
+	tt := ui.NewTester(func(c *ui.Context) {
+		Use(c, Settings{})
+		r := FilePreview(c, file, FilePreviewOptions{})
+		r.Element.Size(480, 300)
+		state = ui.Local(r.Element, "file_preview.code", func() previewCodeState { return previewCodeState{} })
+	}, 500, 320)
+	before := state.viewer.data
+	tt.Frame()
+	if before == nil || state.viewer.data != before || len(state.lines) != 100001 {
+		t.Fatal("unchanged preview rebuilt code cache")
+	}
+	n := 0
+	for _, text := range tt.Texts() {
+		if text == "var seal = 1" {
+			n++
+		}
+	}
+	if n == 0 || n > 60 {
+		t.Fatalf("built %d code lines", n)
+	}
+	file.Text = "package court"
+	tt.Frame()
+	if len(state.lines) != 1 || state.lines[0] != "package court" || state.viewer.data == before {
+		t.Fatal("changed preview retained code cache")
+	}
+}