Make feature tests less specific

Author: spoorcc

features/check-git-repo.feature

@@ -217,11 +217,10 @@ Feature: Checking dependencies from a git repository
                   url: https://github.com/dfetch-org/test-repo-private.git
             """
         When I run "dfetch check"
-        Then the output shows
+        Then the output starts with:
             """
             Dfetch (0.10.0)
             >>>git ls-remote --heads --tags https://github.com/dfetch-org/test-repo-private.git<<< returned 128:
-            fatal: could not read Username for 'https://github.com': terminal prompts disabled
             """
 
     Scenario: SSH issues
@@ -235,13 +234,8 @@ Feature: Checking dependencies from a git repository
                   url: git@github.com:dfetch-org/test-repo-private.git
             """
         When I run "dfetch check"
-        Then the output shows
+        Then the output starts with:
             """
             Dfetch (0.10.0)
             >>>git ls-remote --heads --tags git@github.com:dfetch-org/test-repo-private.git<<< returned 128:
-            Host key verification failed.
-            fatal: Could not read from remote repository.
-
-            Please make sure you have the correct access rights
-            and the repository exists.
             """

features/steps/generic_steps.py

@@ -247,8 +247,17 @@ def multisub(patterns: List[Tuple[Pattern[str], str]], text: str) -> str:
     return text
 
 
+@then("the output starts with:")
+def step_impl(context):
+    check_output(context, line_count=len(context.text.splitlines()))
+
+
 @then("the output shows")
 def step_impl(context):
+    check_output(context)
+
+
+def check_output(context, line_count=None):
     expected_text = multisub(
         patterns=[
             (git_hash, r"\1[commit hash]\2"),
@@ -273,7 +282,9 @@ def step_impl(context):
         text=context.cmd_output,
     )
 
-    diff = difflib.ndiff(actual_text.splitlines(), expected_text.splitlines())
+    diff = difflib.ndiff(
+        actual_text.splitlines()[:line_count], expected_text.splitlines()
+    )
 
     diffs = [x for x in diff if x[0] in ("+", "-")]
     if diffs: