test: update runner file and generate correct fixtures

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---

Author: anandkaranubc

lib/node_modules/@stdlib/math/base/special/expf/test/fixtures/julia/medium_negative.json

@@ -19,29 +19,36 @@
 import JSON
 
 """
-	gen( domain, filepath )
+	gen( domain, name )
 
 Generate fixture data and write to file.
 
 # Arguments
 
 * `domain`: domain
-* `filepath::AbstractString`: filepath of the output file
+* `name::AbstractString`: output filename
 
 # Examples
 
 ``` julia
-julia> x = range( -100, stop = 100, length = 2001 );
-julia> gen( x, \"./data.json\" );
+julia> x = range( -1, stop = 1, length = 2001 );
+julia> gen( x, \"data.json\" );
 ```
 """
-function gen( domain, filepath )
+function gen( domain, name )
 	x = collect( domain );
 	y = exp.( x );
+
+	# Store data to be written to file as a collection:
 	data = Dict([
 		("x", x),
 		("expected", y)
 	]);
+
+	# Based on the script directory, create an output filepath:
+	filepath = joinpath( dir, name );
+
+	# Write the data to the output filepath as JSON:
 	outfile = open( filepath, "w" );
 	write( outfile, JSON.json(data) );
 	write( outfile, "\n" );
@@ -55,26 +62,21 @@ file = @__FILE__;
 dir = dirname( file );
 
 # Medium negative values:
-x = Float32.(range( -86.9, stop = -0.3535, length = 1000 ));
-out = joinpath( dir, "./medium_negative_float32.json" );
-gen( x, out );
+x = Float32.( range( -88.721, stop = -1.0, length = 2000 ) );
+gen( x, "./medium_negative.json" );
 
-# Medium positive_float32 values:
-x = Float32.(range( 0.3535, stop = 88.721, length = 1000 ));
-out = joinpath( dir, "./medium_positive_float32.json" );
-gen( x, out );
+# Medium positive values:
+x = Float32.( range( 1.0, stop = 88.721, length = 2000 ) );
+gen( x, "./medium_positive.json" );
 
-# Small negative_float32 values:
-x = Float32.(range( -0.3535, stop = -2.0^-14, length = 1000 ));
-out = joinpath( dir, "./small_negative_float32.json" );
-gen( x, out );
+# Small negative values:
+x = Float32.( range( -1.0, stop = -2.0^-27, length = 2000 ) );
+gen( x, "./small_negative.json" );
 
-# Small positive_float32 values:
-x = Float32.(range( 2.0^-14, stop = 0.3535, length = 1000 ));
-out = joinpath( dir, "./small_positive_float32.json" );
-gen( x, out );
+# Small positive values:
+x = Float32.( range( 2.0^-27, stop = 1.0, length = 2000 ) );
+gen( x, "./small_positive.json" );
 
 # Tiny values:
-x = Float32.(range( -2.0^-14, stop = 2.0^-14, length = 1000 ));
-out = joinpath( dir, "./tiny_float32.json" );
-gen( x, out );
+x = Float32.( range( -2.0^-27, stop = 2.0^-27, length = 2000 ) );
+gen( x, "./tiny.json" );