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lib-diff-alternative.sh
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227 lines (199 loc) · 4.32 KB
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# Helpers shared by the test scripts for diff algorithms (patience,
# histogram, etc).
test_diff_frobnitz() {
cat >file1 <<\EOF
#include <stdio.h>
// Frobs foo heartily
int frobnitz(int foo)
{
int i;
for(i = 0; i < 10; i++)
{
printf("Your answer is: ");
printf("%d\n", foo);
}
}
int fact(int n)
{
if(n > 1)
{
return fact(n-1) * n;
}
return 1;
}
int main(int argc, char **argv)
{
frobnitz(fact(10));
}
EOF
cat >file2 <<\EOF
#include <stdio.h>
int fib(int n)
{
if(n > 2)
{
return fib(n-1) + fib(n-2);
}
return 1;
}
// Frobs foo heartily
int frobnitz(int foo)
{
int i;
for(i = 0; i < 10; i++)
{
printf("%d\n", foo);
}
}
int main(int argc, char **argv)
{
frobnitz(fib(10));
}
EOF
file1=$(git rev-parse --short $(git hash-object file1))
file2=$(git rev-parse --short $(git hash-object file2))
cat >expect <<EOF
diff --git a/file1 b/file2
index $file1..$file2 100644
--- a/file1
+++ b/file2
@@ -1,26 +1,25 @@
#include <stdio.h>
+int fib(int n)
+{
+ if(n > 2)
+ {
+ return fib(n-1) + fib(n-2);
+ }
+ return 1;
+}
+
// Frobs foo heartily
int frobnitz(int foo)
{
int i;
for(i = 0; i < 10; i++)
{
- printf("Your answer is: ");
printf("%d\n", foo);
}
}
-int fact(int n)
-{
- if(n > 1)
- {
- return fact(n-1) * n;
- }
- return 1;
-}
-
int main(int argc, char **argv)
{
- frobnitz(fact(10));
+ frobnitz(fib(10));
}
EOF
cat >expect_diffstat <<EOF
file1 => file2 | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)
EOF
STRATEGY=$1
test_expect_success "setup attributes files for tests with $STRATEGY" '
git checkout -b master &&
echo "file* diff=driver" >.gitattributes &&
git add file1 file2 .gitattributes &&
git commit -m "adding files" &&
git checkout -b branchA &&
echo "file* diff=driverA" >.gitattributes &&
git add .gitattributes &&
git commit -m "adding driverA as diff driver" &&
git checkout master &&
git clone --bare --no-local . bare.git
'
test_expect_success "$STRATEGY diff from attributes" '
test_must_fail git -c diff.driver.algorithm=$STRATEGY diff --no-index file1 file2 > output &&
test_cmp expect output
'
test_expect_success "diff from attributes with bare repo with source" '
git -C bare.git --attr-source=branchA -c diff.driver.algorithm=myers \
-c diff.driverA.algorithm=$STRATEGY \
diff HEAD:file1 HEAD:file2 >output &&
test_cmp expect output
83D0
'
test_expect_success "diff from attributes with bare repo with invalid source" '
test_must_fail git -C bare.git --attr-source=invalid-branch diff \
HEAD:file1 HEAD:file2
'
test_expect_success "$STRATEGY diff from attributes has valid diffstat" '
echo "file* diff=driver" >.gitattributes &&
git config diff.driver.algorithm "$STRATEGY" &&
test_must_fail git diff --stat --no-index file1 file2 > output &&
test_cmp expect_diffstat output
'
test_expect_success "$STRATEGY diff" '
test_must_fail git diff --no-index "--diff-algorithm=$STRATEGY" file1 file2 > output &&
test_cmp expect output
'
test_expect_success "$STRATEGY diff command line precedence before attributes" '
echo "file* diff=driver" >.gitattributes &&
git config diff.driver.algorithm myers &&
test_must_fail git diff --no-index "--diff-algorithm=$STRATEGY" file1 file2 > output &&
test_cmp expect output
'
test_expect_success "$STRATEGY diff attributes precedence before config" '
git config diff.algorithm default &&
echo "file* diff=driver" >.gitattributes &&
git config diff.driver.algorithm "$STRATEGY" &&
test_must_fail git diff --no-index file1 file2 > output &&
test_cmp expect output
'
test_expect_success "$STRATEGY diff output is valid" '
mv file2 expect &&
git apply < output &&
test_cmp expect file2
'
}
test_diff_unique() {
cat >uniq1 <<\EOF
1
2
3
4
5
6
EOF
cat >uniq2 <<\EOF
a
b
c
d
e
f
EOF
uniq1=$(git rev-parse --short $(git hash-object uniq1))
uniq2=$(git rev-parse --short $(git hash-object uniq2))
cat >expect <<EOF
diff --git a/uniq1 b/uniq2
index $uniq1..$uniq2 100644
--- a/uniq1
+++ b/uniq2
@@ -1,6 +1,6 @@
-1
-2
-3
-4
-5
-6
+a
+b
+c
+d
+e
+f
EOF
STRATEGY=$1
test_expect_success 'completely different files' '
test_must_fail git diff --no-index "--$STRATEGY" uniq1 uniq2 > output &&
test_cmp expect output
'
}