Equality

Use an eq? procedure

Given a file named “main.scm” with:

(import (scheme base))

(write-u8 (if (eq? <lhs> <rhs>) 65 66))

When I successfully run stak main.scm

Then the stdout should contain exactly “<output>”.

Examples

lhs	rhs	output
’()	’()	A
#f	#f	A
#t	#t	A
’()	#f	B
#f	#t	B
#t	’()	B
42	42	A
42	0	B

Use an eqv? procedure

Given a file named “main.scm” with:

(import (scheme base))

(write-u8 (if (eqv? <lhs> <rhs>) 65 66))

When I successfully run stak main.scm

Then the stdout should contain exactly “<output>”.

Examples

lhs	rhs	output
’()	’()	A
#f	#f	A
#t	#t	A
’()	#f	B
#f	#t	B
#t	’()	B
42	42	A
42	0	B
#\A	#\A	A
#\A	#\B	B

Use an equal? procedure with scalar values

Given a file named “main.scm” with:

(import (scheme base))

(write-u8 (if (equal? <lhs> <rhs>) 65 66))

When I successfully run stak main.scm

Then the stdout should contain exactly “<output>”.

Examples

lhs	rhs	output
’()	’()	A
#f	#f	A
#t	#t	A
’()	#f	B
#f	#t	B
#t	’()	B
42	42	A
42	0	B
#\A	#\A	A
#\A	#\B	B

Use an equal? procedure with collections

Given a file named “main.scm” with:

(import (scheme base))

(write-u8 (if (equal? <lhs> <rhs>) 65 66))

When I successfully run stak main.scm

Then the stdout should contain exactly “<output>”.

Examples

lhs	rhs	output
’()	’()	A
’(1)	‘(1)	A
’(1 2)	‘(1 2)	A
’(1 2 3)	‘(1 2 3)	A
’(1 2 3)	‘(1 2 3 4)	B
#()	#()	A
#(1)	#(1)	A
#(1 2)	#(1 2)	A
#(1 2 3)	#(1 2 3)	A
#(1 2 3)	#(1 2 3 4)	B