diff --git a/test/a_join_a.query b/test/a_join_a.query
new file mode 100644
index 0000000..45b3a0c
--- /dev/null
+++ b/test/a_join_a.query
@@ -0,0 +1 @@
+people⋈people
diff --git a/test/a_join_a.result b/test/a_join_a.result
new file mode 100644
index 0000000..7081477
--- /dev/null
+++ b/test/a_join_a.result
@@ -0,0 +1,9 @@
+id,name,chief,age
+0,jack,0,22
+1,carl,0,20
+2,john,1,30
+3,dean,1,33
+4,eve,0,25
+5,duncan,4,30
+6,paul,4,30
+7,alia,1,28
diff --git a/test/a_joinf_a.query b/test/a_joinf_a.query
new file mode 100644
index 0000000..c218715
--- /dev/null
+++ b/test/a_joinf_a.query
@@ -0,0 +1 @@
+people⧓people
diff --git a/test/a_joinf_a.result b/test/a_joinf_a.result
new file mode 100644
index 0000000..7081477
--- /dev/null
+++ b/test/a_joinf_a.result
@@ -0,0 +1,9 @@
+id,name,chief,age
+0,jack,0,22
+1,carl,0,20
+2,john,1,30
+3,dean,1,33
+4,eve,0,25
+5,duncan,4,30
+6,paul,4,30
+7,alia,1,28
diff --git a/test/a_joinl_a.query b/test/a_joinl_a.query
new file mode 100644
index 0000000..7e03175
--- /dev/null
+++ b/test/a_joinl_a.query
@@ -0,0 +1 @@
+people⧑people
diff --git a/test/a_joinl_a.result b/test/a_joinl_a.result
new file mode 100644
index 0000000..7081477
--- /dev/null
+++ b/test/a_joinl_a.result
@@ -0,0 +1,9 @@
+id,name,chief,age
+0,jack,0,22
+1,carl,0,20
+2,john,1,30
+3,dean,1,33
+4,eve,0,25
+5,duncan,4,30
+6,paul,4,30
+7,alia,1,28
diff --git a/test/a_joinr_a.query b/test/a_joinr_a.query
new file mode 100644
index 0000000..04654a2
--- /dev/null
+++ b/test/a_joinr_a.query
@@ -0,0 +1 @@
+people⧒people
diff --git a/test/a_joinr_a.result b/test/a_joinr_a.result
new file mode 100644
index 0000000..7081477
--- /dev/null
+++ b/test/a_joinr_a.result
@@ -0,0 +1,9 @@
+id,name,chief,age
+0,jack,0,22
+1,carl,0,20
+2,john,1,30
+3,dean,1,33
+4,eve,0,25
+5,duncan,4,30
+6,paul,4,30
+7,alia,1,28