Add test for git binary diff support

tests/test-git-export

@@ -1,49 +1,62 b''
 #!/bin/sh
 
 hg init a
 cd a
 
 echo start > start
 hg ci -Amstart -d '0 0'
 echo new > new
 hg ci -Amnew -d '0 0'
 echo '% new file'
 hg diff --git -r 0
 
 hg cp new copy
 hg ci -mcopy -d '0 0'
 echo '% copy'
 hg diff --git -r 1:tip
 
 hg mv copy rename
 hg ci -mrename -d '0 0'
 echo '% rename'
 hg diff --git -r 2:tip
 
 hg rm rename
 hg ci -mdelete -d '0 0'
 echo '% delete'
 hg diff --git -r 3:tip
 
 cat > src <<EOF
 1
 2
 3
 4
 5
 EOF
 hg ci -Amsrc -d '0 0'
 chmod +x src
 hg ci -munexec -d '0 0'
 echo '% chmod 644'
 hg diff --git -r 5:tip
 
 hg mv src dst
 chmod -x dst
 echo a >> dst
 hg ci -mrenamemod -d '0 0'
 echo '% rename+mod+chmod'
 hg diff --git -r 6:tip
 
 echo '% nonexistent in tip+chmod'
 hg diff --git -r 5:6
+
+echo '% binary diff'
+cp $TESTDIR/binfile.bin .
+hg add binfile.bin
+hg diff --git > b.diff
+cat b.diff
+
+echo '% import binary diff'
+hg revert binfile.bin
+rm binfile.bin
+hg import -mfoo b.diff
+cmp binfile.bin $TESTDIR/binfile.bin
+

tests/test-git-export.out

@@ -1,46 +1,67 b''
 adding start
 adding new
 % new file
 diff --git a/new b/new
 new file mode 100644
 --- /dev/null
 +++ b/new
 @@ -0,0 +1,1 @@
 +new
 % copy
 diff --git a/new b/copy
 copy from new
 copy to copy
 % rename
 diff --git a/copy b/rename
 rename from copy
 rename to rename
 % delete
 diff --git a/rename b/rename
 deleted file mode 100644
 --- a/rename
 +++ /dev/null
 @@ -1,1 +0,0 @@
 -new
 adding src
 % chmod 644
 diff --git a/src b/src
 old mode 100644
 new mode 100755
 % rename+mod+chmod
 diff --git a/src b/dst
 old mode 100755
 new mode 100644
 rename from src
 rename to dst
 --- a/dst
 +++ b/dst
 @@ -3,3 +3,4 @@ 3
  3
  4
  5
 +a
 % nonexistent in tip+chmod
 diff --git a/src b/src
 old mode 100644
 new mode 100755
+% binary diff
+diff --git a/binfile.bin b/binfile.bin
+new file mode 100644
+index 0000000000000000000000000000000000000000..37ba3d1c6f17137d9c5f5776fa040caf5fe73ff9
+GIT binary patch
+literal 593
+zc$@)I0<QguP)<h;3K|Lk000e1NJLTq000mG000mO0ssI2kdbIM00009a7bBm000XU
+z000XU0RWnu7ytkO2XskIMF-Uh9TW;VpMjwv0005-Nkl<ZD9@FWPs=e;7{<>W$NUkd
+zX$nnYLt$-$V!?uy+1V%`z&Eh=ah|duER<4|QWhju3gb^nF*8iYobxWG-qqXl=2~5M
+z*IoDB)sG^CfNuoBmqLTVU^<;@nwHP!1wrWd`{(mHo6VNXWtyh{alzqmsH*yYzpvLT
+zLdY<T=ks|woh-`&01!ej#(xbV1f|pI*=%;d-%F*E*X#ZH`4I%6SS+$EJDE&ct=8po
+ziN#{?_j|kD%Cd|oiqds`xm@;oJ-^?NG3Gdqrs?5u*zI;{nogxsx~^|Fn^Y?Gdc6<;
+zfMJ+iF1J`LMx&A2?dEwNW8ClebzPTbIh{@$hS6*`kH@1d%Lo7fA#}N1)oN7`gm$~V
+z+wDx#)OFqMcE{s!JN0-xhG8ItAjVkJwEcb`3WWlJfU2r?;Pd%dmR+q@mSri5q9_W-
+zaR2~ECX?B2w+zELozC0s*6Z~|QG^f{3I#<`?)Q7U-JZ|q5W;9Q8i_=pBuSzunx=U;
+z9C)5jBoYw9^?EHyQl(M}1OlQcCX>lXB*ODN003Z&P17_@)3Pi=i0wb04<W?v-u}7K
+zXmmQA+wDgE!qR9o8jr`%=ab_&uh(l?R=r;Tjiqon91I2-hIu?57~@*4h7h9uORK#=
+fQItJW-{SoTm)8|5##k|m00000NkvXXu0mjf{mKw4
+
+% import binary diff
+applying b.diff