Enforce test coverage (#91)

Bring scripts to par with httpx

scripts/coverage

@@ -0,0 +1,11 @@
+#!/bin/sh -e
+
+export PREFIX=""
+if [ -d 'venv' ] ; then
+    export PREFIX="venv/bin/"
+fi
+export SOURCE_FILES="httpx tests"
+
+set -x
+
+${PREFIX}coverage report --show-missing --skip-covered --fail-under=91

scripts/test

@@ -1,14 +1,28 @@
-#!/bin/sh -e
+#!/bin/sh
 
 export PREFIX=""
 if [ -d 'venv' ] ; then
     export PREFIX="venv/bin/"
 fi
 
-set -x
-
 if [ -z $GITHUB_ACTIONS ]; then
+    set +e
     scripts/check
+    while [ $? -ne 0 ]; do
+        read -p "Running 'scripts/check' failed. Do you want to run 'scripts/lint' now? [y/N]  " yn
+        case $yn in
+           [Yy]* ) :;;
+           * ) exit;;
+        esac
+        scripts/lint
+        scripts/check
+    done
 fi
 
+set -ex
+
 ${PREFIX}pytest $@
+
+if [ -z $GITHUB_ACTIONS ]; then
+    scripts/coverage
+fi

setup.cfg

@@ -17,6 +17,6 @@ line_length = 88
 multi_line_output = 3
 
 [tool:pytest]
-addopts = --cov=httpcore --cov=tests --cov-report=term-missing -rxXs
+addopts = --cov-report= --cov=httpcore --cov=tests -rxXs
 markers =
   copied_from(source, changes=None): mark test as copied from somewhere else, along with a description of changes made to accodomate e.g. our test setup