Function TestAssetMarkdown

internal/attachments/userasset_test.go:271–331

(t *testing.T)

}

func TestAssetMarkdown(t *testing.T) {
	tests := []struct {
		name        string
		contentType string
		alt         string
		want        string
	}{
		{
			name:        "image",
			contentType: "image/png",
			alt:         "The login error state",
			want:        "![The login error state](https://example.com/assets/1)",
		},
		{
			name:        "image with empty alt text",
			contentType: "image/png",
			want:        "![](https://example.com/assets/1)",
		},
		{
			name:        "video renders as a bare URL so it plays",
			contentType: "video/mp4",
			want:        "https://example.com/assets/1",
		},
		{
			// A bare URL is the only form that plays.
			name:        "a video alt does not reach the embed",
			contentType: "video/mp4",
			alt:         "repro.mp4",
			want:        "https://example.com/assets/1",
		},
		{
			name:        "alt text cannot close the image early",
			contentType: "image/png",
			alt:         "![x](https://evil.example.com/x.png)",
			want:        `![!\[x\](https://evil.example.com/x.png)](https://example.com/assets/1)`,
		},
		{
			name:        "backslashes are escaped",
			contentType: "image/png",
			alt:         `a\b`,
			want:        `![a\\b](https://example.com/assets/1)`,
		},
		{
			name:        "newlines cannot break out of the image",
			contentType: "image/png",
			alt:         "first\nsecond\r\nthird",
			want:        "![first second  third](https://example.com/assets/1)",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			var a UserAsset = &imageAsset{asset{contentType: tt.contentType, alt: tt.alt}}
			if strings.HasPrefix(tt.contentType, "video/") {
				a = &videoAsset{asset{contentType: tt.contentType, alt: tt.alt}}
			}

			assert.Equal(t, tt.want, a.markdown("https://example.com/assets/1"))