test(download): cover parseGithubURL branches

pkg/download/download_test.go

@@ -6,6 +6,13 @@ import (
 
 const testBaseURL = "https://example.com/file.tgz"
 
+const (
+	testGithubOrg  = "devsy-org"
+	testGithubRepo = "devsy"
+	testGithubFile = "devsy-linux-amd64"
+	testGithubTag  = "v1.2.3"
+)
+
 func TestSanitizeURL(t *testing.T) {
 	tests := []struct {
 		name string
@@ -38,3 +45,83 @@ func TestSanitizeURL(t *testing.T) {
 		})
 	}
 }
+
+func TestParseGithubURLValid(t *testing.T) {
+	tests := []struct {
+		name string
+		path string
+		want githubReleaseRef
+	}{
+		{
+			name: "latest release",
+			path: "/" + testGithubOrg + "/" + testGithubRepo + "/releases/latest/download/" + testGithubFile,
+			want: githubReleaseRef{
+				org:  testGithubOrg,
+				repo: testGithubRepo,
+				file: testGithubFile,
+			},
+		},
+		{
+			name: "tagged release",
+			path: "/" + testGithubOrg + "/" + testGithubRepo + "/releases/download/" + testGithubTag + "/" + testGithubFile,
+			want: githubReleaseRef{
+				org:     testGithubOrg,
+				repo:    testGithubRepo,
+				release: testGithubTag,
+				file:    testGithubFile,
+			},
+		},
+		{
+			name: "latest without leading slash",
+			path: testGithubOrg + "/" + testGithubRepo + "/releases/latest/download/" + testGithubFile,
+			want: githubReleaseRef{
+				org:  testGithubOrg,
+				repo: testGithubRepo,
+				file: testGithubFile,
+			},
+		},
+		{
+			name: "tagged without leading slash",
+			path: testGithubOrg + "/" + testGithubRepo + "/releases/download/" + testGithubTag + "/" + testGithubFile,
+			want: githubReleaseRef{
+				org:     testGithubOrg,
+				repo:    testGithubRepo,
+				release: testGithubTag,
+				file:    testGithubFile,
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, ok := parseGithubURL(tt.path)
+			if !ok {
+				t.Fatalf("parseGithubURL(%q) ok = false, want true", tt.path)
+			}
+			if got != tt.want {
+				t.Errorf("parseGithubURL(%q) = %+v, want %+v", tt.path, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestParseGithubURLInvalid(t *testing.T) {
+	tests := []struct {
+		name string
+		path string
+	}{
+		{name: "too few segments", path: "/devsy-org/devsy/releases/latest/download"},
+		{name: "too many segments", path: "/devsy-org/devsy/releases/latest/download/dir/file"},
+		{name: "missing releases segment", path: "/devsy-org/devsy/archive/v1.2.3/file"},
+		{name: "unknown middle segment", path: "/devsy-org/devsy/releases/foo/download/file"},
+		{name: "latest without download", path: "/devsy-org/devsy/releases/latest/file"},
+		{name: "empty path", path: ""},
+		{name: "root slash", path: "/"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if _, ok := parseGithubURL(tt.path); ok {
+				t.Errorf("parseGithubURL(%q) ok = true, want false", tt.path)
+			}
+		})
+	}
+}