fix(tests): completed test coverage for npm2

Author: davidlday

commitizen/providers.py

@@ -214,7 +214,7 @@ def set_version(self, version: str):
                 json.dumps(lock_document, indent=self.indent) + "\n"
             )
         if self.shrinkwrap_file.exists():
-            shrinkwrap_document = self.set_lock_version(
+            shrinkwrap_document = self.set_shrinkwrap_version(
                 json.loads(self.shrinkwrap_file.read_text()), version
             )
             self.shrinkwrap_file.write_text(

tests/test_version_providers.py

@@ -278,6 +278,20 @@ def test_scm_provider_default_without_commits_and_tags(config: BaseConfig):
 }
 """
 
+NPM_NO_VERSION = """\
+{
+    "name": "whatever"
+}
+"""
+
+NPM_MULTIPLE_VERSIONS = """\
+{
+    "name": "whatever",
+    "version": "0.1.0",
+    "version": "0.2.0",
+}
+"""
+
 NPM2_PROVIDER = [
     (
         NPM_PACKAGE_JSON,
@@ -348,3 +362,15 @@ def test_npm2_provider(
         assert pkg_lock.read_text() == dedent(pkg_lock_expected)
     if pkg_shrinkwrap_content:
         assert pkg_shrinkwrap.read_text() == dedent(pkg_shrinkwrap_expected)
+
+
+def test_npm2_exceptions(
+    config: BaseConfig,
+):
+    config.settings["version_provider"] = "npm2"
+    provider = get_provider(config)
+    assert isinstance(provider, Npm2Provider)
+    with pytest.raises(ValueError):
+        provider.get_package_version(NPM_NO_VERSION)
+    with pytest.raises(ValueError):
+        provider.get_package_version(NPM_MULTIPLE_VERSIONS)