tests: verify requirements.txt captures versions

Signed-off-by: Alfredo Deza <adeza@anchore.com>

imgbom/cataloger/python/parse_requirements_test.go

@@ -0,0 +1,39 @@
+package python
+
+import (
+	"os"
+	"testing"
+
+	"github.com/anchore/imgbom/imgbom/pkg"
+)
+
+func TestParseRequirementsTxt(t *testing.T) {
+	expected := map[string]pkg.Package{
+		"foo": {
+			Name:     "foo",
+			Version:  "1.0.0",
+			Language: pkg.Python,
+			Type:     pkg.PythonRequirementsPkg,
+			Licenses: []string{},
+		},
+		"flask": {
+			Name:     "flask",
+			Version:  "4.0.0",
+			Language: pkg.Python,
+			Type:     pkg.PythonRequirementsPkg,
+			Licenses: []string{},
+		},
+	}
+	fixture, err := os.Open("test-fixtures/requires/requirements.txt")
+	if err != nil {
+		t.Fatalf("failed to open fixture: %+v", err)
+	}
+
+	actual, err := parseRequirementsTxt(fixture.Name(), fixture)
+	if err != nil {
+		t.Fatalf("failed to parse requirements: %+v", err)
+	}
+
+	assertPkgsEqual(t, actual, expected)
+
+}

imgbom/cataloger/python/parse_wheel_egg_test.go

@@ -9,11 +9,11 @@ import (
 
 func assertPkgsEqual(t *testing.T, actual []pkg.Package, expected map[string]pkg.Package) {
 	t.Helper()
-	if len(actual) != 1 {
+	if len(actual) != len(expected) {
 		for _, a := range actual {
 			t.Log("   ", a)
 		}
-		t.Fatalf("unexpected package count: %d!=%d", len(actual), 1)
+		t.Fatalf("unexpected package count: %d!=%d", len(actual), len(expected))
 	}
 
 	for _, a := range actual {
@@ -34,10 +34,13 @@ func assertPkgsEqual(t *testing.T, actual []pkg.Package, expected map[string]pkg
 			t.Errorf("bad package type: %+v", a.Type)
 		}
 
-		if len(a.Licenses) < 1 {
+		if len(a.Licenses) < len(expectedPkg.Licenses) {
 			t.Errorf("bad package licenses count: '%+v'", a.Licenses)
-		} else if a.Licenses[0] != expectedPkg.Licenses[0] {
+		}
-			t.Errorf("bad package licenses: '%+v'", a.Licenses)
+		if len(a.Licenses) > 0 {
+			if a.Licenses[0] != expectedPkg.Licenses[0] {
+				t.Errorf("bad package licenses: '%+v'", a.Licenses)
+			}
 		}
 
 	}

imgbom/cataloger/python/test-fixtures/requires/requirements.txt

@@ -0,0 +1,7 @@
+ flask == 4.0.0
+# a line that is ignored
+sqlalchemy >= 1.0.0
+ foo == 1.0.0 # a comment that needs to be ignored
+-e https://github.com/pecan/pecan.git
+-r other-requirements.txt
+--requirements super-secretrequirements.txt