added vignettebuilder specs + allowed mepty param lists

DESCRIPTION

@@ -1,16 +1,21 @@
 Package: infuser
 Type: Package
 Title: A Very Basic Templating Engine
-Version: 0.2.3
-Date: 2016-04-06
+Version: 0.2.4
+Date: 2016-08-30
 Author: Bart Smeets
 Maintainer: Bart Smeets <bartsmeets86@gmail.com>
 Description: Replace parameters in strings and/or text files with specified
     values.
 License: MIT + file LICENSE
 LazyData: TRUE
 Suggests:
-    testthat
+    testthat,
+    knitr,
+    rmarkdown,
+    dplyr,
+    magrittr
 URL: https://github.com/bart6114/infuser/
 BugReports: https://github.com/bart6114/infuser/issues
 RoxygenNote: 5.0.1
+VignetteBuilder: knitr

R/core.R

@@ -35,6 +35,9 @@ infuse <- function(file_or_string, ..., variable_identifier = getOption("variabl
 
   params_supplied <- list(...)
 
+  ## no params supplied, return unaltered template
+  if(length(params_supplied)==0) return(template)
+
   ## if a list or environment is passed as the first argument, only process this
   if("key_value_list" %in% names(params_supplied)) warning("specification of key_value_list no longer required; simply pass the list/environment as the first parameter")
 

README.md

@@ -181,13 +181,23 @@ Simply create a new issue at this GitHub repository.
 Changes
 -------
 
+### v.0.2.4
+-   allows passing of empty parameter lists
+
+### v.0.2.3
+-   alligned with new `testthat` specs
+
 ### v.0.2.2
 
 -   dropped `key_value_list` parameter (will be
     interpreted automatically)
 -   fixed passing of the `variable_identifier`
 -   ability to make `variable_identifier` persistent
 
+### v.0.2.3
+
+-   added support for empty param list
+
 ### v.0.2.1
 
 -   fixed: incorrect replacement of parameters with same prefix

tests/testthat/test_core_functionality.R

@@ -139,3 +139,7 @@ test_that("variable identifiers are correctly used when set as an option",{
   expect_equivalent(
     infuse("${test}", test = "123", simple_character=TRUE), "123")
 })
+
+test_that("empty param list is accepted",{
+  expect_equivalent(infuse(sql), sql)
+})

vignettes/getting_started.Rmd

@@ -150,7 +150,7 @@ my_transform_function<-function(v){
 infuse(sql, name = name, transform_function = my_transform_function)
 ```
 
-Of course you can also use functions from other packages. Specifically for SQL I advise you to take a look at the ```dplyr::build_sql``` function.
+Of course you can also use functions from other packages. Specifically for SQL I advise you to take a look at the `dplyr::build_sql` function.
 
 
 ```{r}