test: add update version and checksum tests

internal/update/version_test.go

@@ -0,0 +1,65 @@
+package update
+
+import "testing"
+
+func TestIsNewer(t *testing.T) {
+	tests := []struct {
+		current string
+		latest  string
+		want    bool
+	}{
+		{"1.0.0", "1.0.1", true},
+		{"v1.0.0", "v1.1.0", true},
+		{"1.0.0", "v2.0.0", true},
+		{"1.0.0", "1.0.0", false},
+		{"1.1.0", "1.0.0", false},
+		{" 1.0.0 ", "1.0.1", true},
+		{"1.0.0", "1.0.1-rc.1", true},
+		{"1.0.0-rc.1", "1.0.0", true},
+		{"dev", "1.0.0", false},
+		{"1.0.0", "not-a-version", false},
+		{"", "1.0.0", false},
+		{"1.0.0", "", false},
+	}
+
+	for _, tt := range tests {
+		if got := IsNewer(tt.current, tt.latest); got != tt.want {
+			t.Errorf("IsNewer(%q, %q) = %v, want %v", tt.current, tt.latest, got, tt.want)
+		}
+	}
+}
+
+func TestTrimV(t *testing.T) {
+	tests := []struct {
+		in   string
+		want string
+	}{
+		{"v1.2.3", "1.2.3"},
+		{"1.2.3", "1.2.3"},
+		{" v1.2.3 ", "1.2.3"},
+	}
+
+	for _, tt := range tests {
+		if got := trimV(tt.in); got != tt.want {
+			t.Errorf("trimV(%q) = %q, want %q", tt.in, got, tt.want)
+		}
+	}
+}
+
+func TestCanonical(t *testing.T) {
+	tests := []struct {
+		in   string
+		want string
+	}{
+		{"1.2.3", "v1.2.3"},
+		{"v1.2.3", "v1.2.3"},
+		{"", ""},
+		{"garbage", ""},
+	}
+
+	for _, tt := range tests {
+		if got := canonical(tt.in); got != tt.want {
+			t.Errorf("canonical(%q) = %q, want %q", tt.in, got, tt.want)
+		}
+	}
+}