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t6016-rev-list-graph-simplify-history.sh
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#!/bin/sh
# There's more than one "correct" way to represent the history graphically.
# These tests depend on the current behavior of the graphing code. If the
# graphing code is ever changed to draw the output differently, these tests
# cases will need to be updated to know about the new layout.
test_description='--graph and simplified history'
. ./test-lib.sh
test_expect_success 'set up rev-list --graph test' '
# 3 commits on branch A
test_commit A1 foo.txt &&
test_commit A2 bar.txt &&
test_commit A3 bar.txt &&
git branch -m master A &&
# 2 commits on branch B, started from A1
git checkout -b B A1 &&
test_commit B1 foo.txt &&
test_commit B2 abc.txt &&
# 2 commits on branch C, started from A2
git checkout -b C A2 &&
test_commit C1 xyz.txt &&
test_commit C2 xyz.txt &&
# Octopus merge B and C into branch A
git checkout A &&
git merge B C &&
git tag A4
test_commit A5 bar.txt &&
# More commits on C, then merge C into A
git checkout C &&
test_commit C3 foo.txt &&
test_commit C4 bar.txt &&
git checkout A &&
git merge -s ours C &&
git tag A6
test_commit A7 bar.txt &&
# Store commit names in variables for later use
A1=$(git rev-parse --verify A1) &&
A2=$(git rev-parse --verify A2) &&
A3=$(git rev-parse --verify A3) &&
A4=$(git rev-parse --verify A4) &&
A5=$(git rev-parse --verify A5) &&
A6=$(git rev-parse --verify A6) &&
A7=$(git rev-parse --verify A7) &&
B1=$(git rev-parse --verify B1) &&
B2=$(git rev-parse --verify B2) &&
C1=$(git rev-parse --verify C1) &&
C2=$(git rev-parse --verify C2) &&
C3=$(git rev-parse --verify C3) &&
C4=$(git rev-parse --verify C4)
'
test_expect_success '--graph --all' '
rm -f expected &&
echo "* $A7" >> expected &&
echo "* $A6" >> expected &&
echo "|\\ " >> expected &&
echo "| * $C4" >> expected &&
echo "| * $C3" >> expected &&
echo "* | $A5" >> expected &&
echo "| | " >> expected &&
echo "| \\ " >> expected &&
echo "*-. \\ $A4" >> expected &&
echo "|\\ \\ \\ " >> expected &&
echo "| | |/ " >> expected &&
echo "| | * $C2" >> expected &&
echo "| | * $C1" >> expected &&
echo "| * | $B2" >> expected &&
echo "| * | $B1" >> expected &&
echo "* | | $A3" >> expected &&
echo "| |/ " >> expected &&
echo "|/| " >> expected &&
echo "* | $A2" >> expected &&
echo "|/ " >> expected &&
echo "* $A1" >> expected &&
git rev-list --graph --all > actual &&
test_cmp expected actual
'
# Make sure the graph_is_interesting() code still realizes
# that undecorated merges are interesting, even with --simplify-by-decoration
test_expect_success '--graph --simplify-by-decoration' '
rm -f expected &&
git tag -d A4
echo "* $A7" >> expected &&
echo "* $A6" >> expected &&
echo "|\\ " >> expected &&
echo "| * $C4" >> expected &&
echo "| * $C3" >> expected &&
echo "* | $A5" >> expected &&
echo "| | " >> expected &&
echo "| \\ " >> expected &&
echo "*-. \\ $A4" >> expected &&
echo "|\\ \\ \\ " >> expected &&
echo "| | |/ " >> expected &&
echo "| | * $C2" >> expected &&
echo "| | * $C1" >> expected &&
echo "| * | $B2" >> expected &&
echo "| * | $B1" >> expected &&
echo "* | | $A3" >> expected &&
echo "| |/ " >> expected &&
echo "|/| " >> expected &&
echo "* | $A2" >> expected &&
echo "|/ " >> expected &&
echo "* $A1" >> expected &&
git rev-list --graph --all --simplify-by-decoration > actual &&
test_cmp expected actual
'
# Get rid of all decorations on branch B, and graph with it simplified away
test_expect_success '--graph --simplify-by-decoration prune branch B' '
rm -f expected &&
git tag -d B2
git tag -d B1
git branch -d B
echo "* $A7" >> expected &&
echo "* $A6" >> expected &&
echo "|\\ " >> expected &&
echo "| * $C4" >> expected &&
echo "| * $C3" >> expected &&
echo "* | $A5" >> expected &&
echo "* | $A4" >> expected &&
echo "|\\ \\ " >> expected &&
echo "| |/ " >> expected &&
echo "| * $C2" >> expected &&
echo "| * $C1" >> expected &&
echo "* | $A3" >> expected &&
echo "|/ " >> expected &&
echo "* $A2" >> expected &&
echo "* $A1" >> expected &&
git rev-list --graph --simplify-by-decoration --all > actual &&
test_cmp expected actual
'
test_expect_success '--graph --full-history -- bar.txt' '
rm -f expected &&
git tag -d B2
git tag -d B1
git branch -d B
echo "* $A7" >> expected &&
echo "* $A6" >> expected &&
echo "|\\ " >> expected &&
echo "| * $C4" >> expected &&
echo "* | $A5" >> expected &&
echo "* | $A4" >> expected &&
echo "|\\ \\ " >> expected &&
echo "| |/ " >> expected &&
echo "* | $A3" >> expected &&
echo "|/ " >> expected &&
echo "* $A2" >> expected &&
git rev-list --graph --full-history --all -- bar.txt > actual &&
test_cmp expected actual
'
test_expect_success '--graph --full-history --simplify-merges -- bar.txt' '
rm -f expected &&
git tag -d B2
git tag -d B1
git branch -d B
echo "* $A7" >> expected &&
echo "* $A6" >> expected &&
echo "|\\ " >> expected &&
echo "| * $C4" >> expected &&
echo "* | $A5" >> expected &&
echo "* | $A3" >> expected &&
echo "|/ " >> expected &&
echo "* $A2" >> expected &&
git rev-list --graph --full-history --simplify-merges --all \
-- bar.txt > actual &&
test_cmp expected actual
'
test_expect_success '--graph -- bar.txt' '
rm -f expected &&
git tag -d B2
git tag -d B1
git branch -d B
echo "* $A7" >> expected &&
echo "* $A5" >> expected &&
echo "* $A3" >> expected &&
echo "| * $C4" >> expected &&
echo "|/ " >> expected &&
echo "* $A2" >> expected &&
git rev-list --graph --all -- bar.txt > actual &&
test_cmp expected actual
'
test_expect_success '--graph --sparse -- bar.txt' '
rm -f expected &&
git tag -d B2
git tag -d B1
git branch -d B
echo "* $A7" >> expected &&
echo "* $A6" >> expected &&
echo "* $A5" >> expected &&
echo "* $A4" >> expected &&
echo "* $A3" >> expected &&
echo "| * $C4" >> expected &&
echo "| * $C3" >> expected &&
echo "| * $C2" >> expected &&
echo "| * $C1" >> expected &&
echo "|/ " >> expected &&
echo "* $A2" >> expected &&
echo "* $A1" >> expected &&
git rev-list --graph --sparse --all -- bar.txt > actual &&
test_cmp expected actual
'
test_expect_success '--graph ^C4' '
rm -f expected &&
echo "* $A7" >> expected &&
echo "* $A6" >> expected &&
echo "* $A5" >> expected &&
echo "* $A4" >> expected &&
echo "|\\ " >> expected &&
echo "| * $B2" >> expected &&
echo "| * $B1" >> expected &&
echo "* $A3" >> expected &&
git rev-list --graph --all ^C4 > actual &&
test_cmp expected actual
'
test_expect_success '--graph ^C3' '
rm -f expected &&
echo "* $A7" >> expected &&
echo "* $A6" >> expected &&
echo "|\\ " >> expected &&
echo "| * $C4" >> expected &&
echo "* $A5" >> expected &&
echo "* $A4" >> expected &&
echo "|\\ " >> expected &&
echo "| * $B2" >> expected &&
echo "| * $B1" >> expected &&
echo "* $A3" >> expected &&
git rev-list --graph --all ^C3 > actual &&
test_cmp expected actual
'
# I don't think the ordering of the boundary commits is really
# that important, but this test depends on it. If the ordering ever changes
# in the code, we'll need to update this test.
test_expect_success '--graph --boundary ^C3' '
rm -f expected &&
echo "* $A7" >> expected &&
echo "* $A6" >> expected &&
echo "|\\ " >> expected &&
echo "| * $C4" >> expected &&
echo "* | $A5" >> expected &&
echo "| | " >> expected &&
echo "| \\ " >> expected &&
echo "*-. \\ $A4" >> expected &&
echo "|\\ \\ \\ " >> expected &&
echo "| * | | $B2" >> expected &&
echo "| * | | $B1" >> expected &&
echo "* | | | $A3" >> expected &&
echo "o | | | $A2" >> expected &&
echo "|/ / / " >> expected &&
echo "o | | $A1" >> expected &&
echo " / / " >> expected &&
echo "| o $C3" >> expected &&
echo "|/ " >> expected &&
echo "o $C2" >> expected &&
git rev-list --graph --boundary --all ^C3 > actual &&
test_cmp expected actual
'
test_done