Fixed capitalized package bug on poetry init

Used canonicalize_name to standardize the names of all packages in
poetry init with interactive dependencies. Given its importance, added a
test_canoncalize_name() test to tests/utils/test_helpers.py

src/poetry/console/commands/init.py

@@ -255,7 +255,7 @@ def _determine_requirements(
             package = self.ask(
                 "Search for package to add (or leave blank to continue):"
             )
-            while package is not None:
+            while package:
                 constraint = self._parse_requirements([package])[0]
                 if (
                     "git" in constraint
@@ -268,15 +268,14 @@ def _determine_requirements(
                     package = self.ask("\nAdd a package:")
                     continue
 
-                matches = self._get_pool().search(constraint["name"])
-
+                canonicalized_name = canonicalize_name(constraint["name"])
+                matches = self._get_pool().search(canonicalized_name)
                 if not matches:
                     self.line("<error>Unable to find package</error>")
                     package = False
                 else:
                     choices = []
                     matches_names = [p.name for p in matches]
-                    canonicalized_name = canonicalize_name(constraint["name"])
                     exact_match = canonicalized_name in matches_names
                     if exact_match:
                         choices.append(
@@ -287,7 +286,7 @@ def _determine_requirements(
                         if len(choices) >= 10:
                             break
 
-                        if found_package.name.lower() == constraint["name"].lower():
+                        if found_package.name.lower() == canonicalized_name:
                             continue
 
                         choices.append(found_package.pretty_name)

tests/console/commands/test_init.py

@@ -123,6 +123,7 @@ def test_interactive_with_dependencies(tester: CommandTester, repo: "TestReposit
     repo.add_package(get_package("django-pendulum", "0.1.6-pre4"))
     repo.add_package(get_package("pendulum", "2.0.0"))
     repo.add_package(get_package("pytest", "3.6.0"))
+    repo.add_package(get_package("flask", "2.0.0"))
 
     inputs = [
         "my-package",  # Package name
@@ -135,6 +136,9 @@ def test_interactive_with_dependencies(tester: CommandTester, repo: "TestReposit
         "pendulu",  # Search for package
         "1",  # Second option is pendulum
         "",  # Do not set constraint
+        "Flask",
+        "0",
+        "",
         "",  # Stop searching for packages
         "",  # Interactive dev packages
         "pytest",  # Search for package
@@ -158,6 +162,7 @@ def test_interactive_with_dependencies(tester: CommandTester, repo: "TestReposit
 [tool.poetry.dependencies]
 python = "~2.7 || ^3.6"
 pendulum = "^2.0.0"
+flask = "^2.0.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^3.6.0"

tests/utils/test_helpers.py

@@ -3,6 +3,7 @@
 
 from poetry.core.utils.helpers import parse_requires
 
+from poetry.utils.helpers import canonicalize_name
 from poetry.utils.helpers import get_cert
 from poetry.utils.helpers import get_client_cert
 
@@ -79,3 +80,17 @@ def test_get_client_cert(config: "Config"):
     config.merge({"certificates": {"foo": {"client-cert": client_cert}}})
 
     assert get_client_cert(config, "foo") == Path(client_cert)
+
+
+def test_canonicalize_name():
+    names = ["flask", "Flask", "FLASK", "FlAsK", "fLaSk57", "flask-57"]
+    canonicalized_names = [canonicalize_name(name) for name in names]
+
+    assert canonicalized_names == [
+        "flask",
+        "flask",
+        "flask",
+        "flask",
+        "flask57",
+        "flask-57",
+    ]